public static void unzip(File zipFile, File targetDirectory) throws IOException {
    ZipInputStream zis = new ZipInputStream(
            new BufferedInputStream(new FileInputStream(zipFile)));
    try {
        ZipEntry ze;
        int count;
        byte[] buffer = new byte[8192];
        while ((ze = zis.getNextEntry()) != null) {
            File file = new File(targetDirectory, ze.getName());
            File dir = ze.isDirectory() ? file : file.getParentFile();
    } finally {
        zis.close();
    }
}

File file = new File(context.getFilesDir() + "/ACPLUS.ZIP");
File targetDir = new File(context.getFilesDir() + "/DATA");

if (!targetDir.exists()) {
    targetDir.mkdirs();
}

if(file.exists()) {
    try {
        ZIPHandler.unzip(file, targetDir);
        }
   catch (IOException e) {
        e.printStackTrace();
    }
}

while ((ze = zis.getNextEntry()) != null) {